Trump card
US /ˈtrʌmp ˌkɑːrd/
UK /ˈtrʌmp ˌkɑːd/
名詞
切り札, 奥の手
a powerful resource or advantage that can be used to achieve a desired outcome, especially at a crucial moment
例:
•
His extensive experience in the field was his trump card during the negotiations.
その分野での彼の豊富な経験が、交渉中の彼の切り札だった。
•
The new evidence proved to be the prosecution's trump card.
新しい証拠は検察側の切り札となった。